Method for removing chloride impurities from rhodochrosite and eluent adopted by same

Abstract

The invention discloses an eluent for removing chloride impurities from rhodochrosite. The eluent is a mixed solution of ammonium sulfate and ammonia water, wherein the mass of the ammonium sulfate accounts for 0.2-0.6% of the total mass of the mixed solution; and the concentration of the ammonia water is 0.01-0.05M. A natural ore sample is eluted and filtered by use of the eluent to obtain filtrate and an ore sample after removing chloride impurities. The dechlorination method provided by the invention is simple to operate, only requires normal-temperature stirring and filtration, and is easy to implement industrially; the eluent can prevent the dissolution loss of manganese ions; and since the components in the eluent can form precipitates with barium ions and calcium ions contained in rhodochrosite, the washing effect is better.

Description

technical field

[0001] The present invention relates to an eluent for chlorine removal and a method for removing chloride impurities from rhodochrosite ore. Background technique

[0002] At present, in the process of preparing electrolytic manganese, due to the use of acidic anolyte to dissolve rhodochrosite ore, the concentration of chloride ions reaches 6g / L or even higher due to repeated enrichment, resulting in the release of a large amount of chlorine gas during electrolytic manganese, which affects the production of electrolytic manganese. Quality and normal production, so the dechlorination step must be carried out before electrolysis. However, removing chlorine ions in the electrolyte requires a large amount of chemical reagents, and may introduce various impurity ions into the electrolyte, and the method is complicated and the cost is high. However, the method is to dissolve the ore after simply washing the ore sample, and the treatment method is simple and easy to...